A donibam kendall



@uitrit graffe atrntgffirr.

Lata-s Paantlvo. 77,986, ma May 19, 186s.

IMPROVEMENT Illl GUT-OFPVAIIVBYGEAR. x

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To ALL'WHOM IT MAY GONCERN:

. Be it known that I, ADONIRAM I ENDALL, of Buffalo, in the county ofEric, and State of New York., have l invented certain new and usefulImprovements` in Steam-legulating and Out-off Valves; and I do herebydeclare that the following is a full and complete description of thesame, rcference'being hadto the accompanying drawings making a part ofthis specification, in 'which- Figure 1, plated, is a front view withthe .valve closed.

Figures 2 and 3 are front views with `the valve open.

Figure 4 is a detached view.`

Figure 5, plate 2, is a top view.`

Figures 6 and 7 are inside views. t

Figure 8 is a transverse section Figures 9 and 10 detached'yiews of thevalve.

Figure 11, a detached section.p 'i

Like letters of reference referto like parts in tbe several views.

I am aware that oscillating circular' steam-valve s have been used, andoperated by pawls and levers, as described in the patent of R. Sandersonand others, butwhich I do not claim. That which distinguishes myinvention from all othersis as hereinafter described.l 4

A, iig;1, is a valvechamber,in -which a valve hereafter described' islocated, and of which B C are the steam-pipes. I), iig. 4, is arockfshaft projected through, said chamber, and to which thc valvereferred to is Iattached, and by which it is operated by the vibrator E,Iig. 1.

To the upper arms F of this vibrator are 'pivoted pawlsG, which are madeto engage thelug H, andthereby operate the valve, as will hereafter beshown. Immediately back of the pawls isarranged a pair of levers, I, thelower ends of which arepivoted to tbe chamber. vThe upper or freecnds'aro made to slant upward `to a point X,.as shown in iig. 4, therebyforming a'- pair of inclined planes upward from the p'ivoted ends.

These levers I are connected to a lever, J, by a pair of links, K, fig;4 and by which th'e said levers I are operated as and for a purposepresently shown. Immediately behird the levers I is a lever, L, pivoted,`at the point, X, ,to the valve-chamber, and connected to the lever J bya link, M, iig. 2, the two being operated conjointly, as will hereafterbe shown. Il, tig. 9, plate 2, is the valve above referred to. Thisvalve, as will be seen, is

circular in form, with deep, square openings or ports O cut in theperiphery. In the edge of this valve is a deep, ,i

groove or channel,

The position of the valve when in place is shown in fig. 8, in whichit'will 'be seen that it is enclosed on the sides' by the walls Q Q',which. areV providedwith ports R, iig. 6, correspcndingin number, shape,and size, to`

the ports O, in the valve. S,iigs. 'and 7, are arms projecting from theend of the rock-shaft.4 To the extreme ends of said arms areattachedthe-stops'T, the purpose of which will hereafter be shown. U is also astop, the arms of which reach upward oneach side of the shaft D, figs. 8and 10, plate 2 ,.and project over and rest upon thcarms S. ,u y vHaving thus described the construction and arrangement of the apparatus,`the practical working of the same is as follows: i

The apparatus is placed lon the top ofv the cylinder, or in any other`desirable place in connection withtheA main steam-pipe. The lower end ofthe vibrator EV is attached to the eccentric,'-and is Athereby madeto`vibra`te. Thus, as it is moved from the position shown irl-iig. 1 -tothat shown in fig. 2, the lug H, which is connected to the rock-shaft,is engaged by the pawl G', and thereby turns the shaft, opening theports of the valve N, as lshown in g. 6,plat 2. Through the open portssteampasses through the pipe B into the chamberA; thencethrough thewalls Q Q', around the edge of the valve, along the groove P, to thelower part of the chamber; thence through the pipe C to the cylinder, asindicated by the arrows. At this time the pawl G' is disengaged from thev lug H by its being made to slide upon the levers I', which, as will beseen, throws the pawl fromthe lug, which on being released from the pawlreturn'simmediately tothe position shown in iig. 1, and thuscloses theports,

shutting oii a further ingress of steam througlvthe valve. On the,reverse'action of thevibration, the lu'g Il is thrownintheoppositedirection, as shown in tig; 3, thereby 'opening tlic valve as sho'wn infig.' 7,`a dmitting steam tothecylinder throughthepoits of the valve,along around the groove in its periphery, to the'pipe @thence into thecylinder as before. The valve is'again instantly closed as beforeby thepawl G becoming d'isengaged'irom the lug, by means of the lever I, andso on alternately, the valve isvopened4 as the vibrator is moved fromright to left, and from lefttoright, and at each instant closed on thepawls becoming disengaged.

i ,'This'closing of the-valve immediately on'the disengagement ofthe.lug and pawls is accomplished by the stop U and varms S, jig. 6. Thelower part of said stop terminates in a stem, A', which is protrudedthrough the Vside of the chamber in a stu'ing-box, B.' 'Now, as theshaft is made to, turn by means of thespawl and lug above described, thearms S will lift up the stop, as shown in hg. G.. On the pawlsbecomingdisengaged from the lugthe pressureof the steam exerted upon the broadbasepf the stop will instantly force itdown, and thereby bring the -armsS to aliorizontal position, as indicated by the. dotted line a, fitr. G,and thus close the`valve, shutting l C oh" the vsteam immediately, aseach' pawl becomes disengaged from the lug.

This closing of the valve may be accomplished by the stops T, attachedto the extremeend of the armsS.-

vThus the stop T, on beinglifted, asshowu iufig. 6, by turning theshaft, will,'on thediscngagement of the p-awls and lug, be forced downby th'e pressure of the steam, and thereby bring the arms-,S toss.horizontalposition as lug, be forced down in lik-e manner, cachtimeclosing the valve-ports.

It will be observed thatthe rock-shaft is' not of a uniform diameter,that part encircled by the wall Q', fig. 8, being somewhat less than'that encircled by the wall Q, liencethe pressure' ot' thesteam onthevalveis unequal. T0 compensate for this, a space, a.,-ig. 8, aroundthe shaft, allows the steam t'o pressen that side oi' thevalve, andthereby equalizel the pressure, causing the valve to be equallybalanced. i

- did the stop U, and so on. The stop T', bein-#lifted as shownin-iig.7, will, en the'disen'gagement of the pawl and In order to insureacertainty in the action ofthe .pawls upon the lug, the .said pfawls areprovided eachwith a dependent' tail, F",.wh ich are pressed outwardly byapin b, iig. 3, fitted lposcly4 in the ring, by which the lug H issecured lto the shaft. Theseipirns are forced outward-by aspring locatedat the inner end ofthe pins', or by the 'pressure of the steam admittedto'the'end of the pins by having tho rock-shaft hollow, 4with a smallhole leading from the holloivY of the shaft to 'the end of the pin,and'ithus bring thestearn Ato act on thepins,

,and force them out against the tail of the pawl.

The actiony of the valvefas above described is that ofa cut-off. It willbe obvious that the amount oi"steam cut o willbe in proportion tolthethrowof the'valve, as the throw of the valve depends .on the length ofvibration given the lug H; hence, the further itis moved either to therightor'to the left, tbewider the valve will be opened and the moresteam cutoff, and vz'ce versc. I I

In order to produceauniformity in the supply of steam, and `therebylproduce an equal movement of the yengine under` a variable pressureot`steani, the leverJis attached to the governor by means of; thelink M,1.L

Now, as the lever will be drawn upward, and thereby push up the levers Ifurtherabovc the lug H, the result will be to'. cause the pawls`G tobecome sooner disengaged from-the lug for the reaso'n'tliat. they do notdrop so, low against the shoulder, but are pushedbit` by the levers overwhich the ends G, iig. 5, slide, and ,by which the pawls are made-todisengage the lug. By this it will be evident that the higher the levers'ane pushed up, the-less will be the vibration ot' the shaft,therefere'theopening of the valvewill be less, and thus eut oii'tbesteam. So, on the contrary, as the balls fall, the lever. J descends,and the levers I drop more-or less and allowthe pawls to :falldeeperagainst the shoulder of thelug, and thereby give-to it-a 'greatervibration, 'and so open the. valve, and allow. the steam 'to follow agreater distance the 'stroke of the piston, -Should the governor ceaseto act in consequence of accident to it, the lever L, iig. 4 1, abovereferred to, will be thrown upabove the apex of the levers, as shown iniig, 4, plate 1, and raise thepawl's G sufficiently to open the valveonly-enough to give the engine a'lighterunning motion, and thus preventany `breaking or injury to the engine or machinery vin consequence o fan accelerated movement that may be givento'it by thestoppingofthegovernor.

. This same result may be obtaiued'by the lever L', iig. 5, plate 2. Oneend ,o'f this lever is pivoted to `the chamber, from which it reachesacross under the ends- G of the pawls. From the under side of thisleverA proceeds astem, E', iig. 8. This stem vis fitted to and made toplay in a sleeve, a', fig. 8, a detached viewv of which is shown iniig.' 2, plate 2.' In this sleeve is tteda lining or bush, c., attachedto the lower end of which is a valve, 25'..I This valve closes anaperture or channel, e, fig. 2, leading from the stungfbox D', throughintothe steam-chamber A. From the lining or bush to which the valve isattached proceeds an arnnf,` to the underside of the levers I 'andbywhichthe valve and lever Lare operatedin the following mannerr When thegovernorceases to act, in consequence of 'accidentor otherwise, thelever T dr ops,'nand'bringhs down the' levers I, lso as to strike thehorizontal arm f, which opens the valveb, thereby allowingsteam to vpassz into the lining 'or bush'c, under the stem E', and forces it up,thereby lifting-the leverI/ above `theapex X of the levers I, and uponwhich the ends G of 'the .pawls will rest disengaged fromthelug, or somuchso as to" allow the valve to operate s uliciently to givetheengines. lightfrunning motion, as did theactio'n of the lever L abovedescribed,

I am aware that cut-oli' valves have been operated bymeansof lpawlsandlug, and that said pawls have been liftedlfor the purpose ofregulating the vibration ofthe valve. 'In these Acases the manner oflfting'the vpawls has been bya yoke, so arranged that lthe upper endwould'rece'ive the weight ofthe pawls on being pushed up for thatpurposei The objection to this method is that the yoke has to'be raisedVto a considerable height in order to raise the pawls; hence itseil'e'ct is not immediate, as vthe 'expansion and contraction of thegovernor do not act suiciently. or immediately to produce the desiredresult atall times;` butin the arrangement of thelevers I, it will ,beseen thatvthefree v,ends or apex X, g. 4, will move much faster and to agreater distance than the 'same would ifthe leverslwelre'u'uited atth-cpoint X, and detached from the chamber,and thenV pushed.

mess s up by the levery JI, which would beanalogousto thatoi' the yoke.By thus causirg the levers l to move faster anl further by the lever-J,amoremmediate action is obtainerlon the pawls, arid `in consequence thevulve is more sensitive to the action of lthe governor.

Bz', iig. 6, is a'slide-,valveoperated from the outside byma stem, N. Inthis valve are holes or portsg, asnoted by the dotted' lines in ig's. 7and 8, correspondingirg' number and size to po'rtsvin the vulve-seat, asiiulicated by the dotted lines c. Through these ports the steam may beallowed to pass directly through the valve to the uylinf` der by passingalong'the'grooves P, in the edge o'f the valve, instead of lpassingthrough the valve, in thwe manner as above described. t

What I claim as my improvement, and desire to secure by Letters Patent,is-- 1. The' levers I I', links K, andlever LI, aseonstr-uetedandarranged irl-combination with thepaivlsfGfls herein set forth, y

'2. Thearrangement of the levefL, in combination with the pavvls G,substantially 'as herein Elescgibetl.'v4

3. The arrangement of the oseillating-valve N and walls Q Q', as setforth. 4. The stop U or T, asconstructed'a'nd arranged in rela'tziouto`the valve N and arras S, s o as to'op'egxte said valve by the pressure fsteam, substantially asset forth. o l

- ADONIRAM KENDALL.-

Witnesses: Y o l W. H. BURRIDGE, J. HLMEsL

